基于PbSe量子点掺杂环形芯光纤的涡旋模式放大  

Vortex Mode Amplification Based on Ring-Core Fiber Doped with PbSe Quantum Dots

作　　者：郭恒菲 韦绘梅 陈娜 董艳华[1,2] 文建湘 商娅娜[1,2] 陈振宜 庞拂飞[1,2] Guo Hengfei;Wei Huimei;Chen Na;Dong Yanhua;Wen Jianxiang;Shang Yana;Chen Zhenyi;Pang Fufei(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China;Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学通信与信息工程学院特种光纤与光接入网重点实验室,上海200444 [2]上海大学特种光纤与先进通信国际合作联合实验室,上海200444

出　　处：《激光与光电子学进展》2024年第9期207-214,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62027818,61975108);高等学校学科创新引智计划(D20031)。

摘　　要：采用改进的化学气相沉积法成功制备了PbSe量子点掺杂环形芯光纤,光纤为双包层结构,其环形芯与内包层折射率差约为2.2%。通过电子探针显微分析技术测试了光纤中的元素种类及含量,在高分辨透射电子显微镜下观测到PbSe量子点的晶格结构,同时测量了拉曼光谱,证明此环形芯光纤中成功掺入PbSe量子点。这为制备半导体量子点掺杂光纤提供了重要的参考价值。利用该光纤搭建了涡旋光放大系统,在信号光波长为1550 nm处实现了1~3阶涡旋模式放大,当泵浦光功率为634 mW时,所有模式的开关增益>13 dB,差分模式增益<2.45 dB。该实验系统有望促进涡旋模式宽带放大的进一步研究。The PbSe quantum dotdoped ringcore fiber is successfully prepared using a modified chemical vapor deposition method.The fiber has a doubleclad structure,with a refractive index difference of approximately 2.2%between the ring core and the inner cladding.The types and contents of elements in the fiber are verified via electron probe microanalysis.The crystal structure of PbSe quantum dots is examined using a highresolution transmission electron microscope,and the Raman spectrum is measured.The results proved that PbSe quantum dots were doped successfully into the ringcore fiber.This provides an important reference value for preparing semiconductor quantum dotdoped fiber.The PbSe quantum dotdoped ringcore fiber is the foundation for the vortex mode amplification system.The first-to thirdorder vortex amplifying modes are realized at 1550 nm.When the pump power is 634 mW,the onoff gains of all modes are greater than 13 dB,and the differential mode gains are less than 2.45 dB.This experimental system is expected to promote further research on vortex mode broadband amplification.

关 键 词：光纤光学 PbSe量子点 环形芯光纤 改进的化学气相沉积法 涡旋模式 增益特性 

分 类 号：TN253[电子电信—物理电子学]